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(No Model.) 2 Sheets-Sheet 1Q C. P. ZIMMEB-MAN.

AIR HEATING FURNACE RADIATOR.

Patented odt. 5,

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(No Model.) 2 Sheets-Sheei; 2.

U. P. ZIMMERMAN.

AIR HEATING FURNACE RADIATOR.

Patented Oct.- 5'

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N. PETERS, PhnlO-Liflwgnphen washin wn. D C.

UNITED S AT-Es PATE T OFFICE.

CHARLES P. ZIMMERMAN, OF NEWARK, NEW JERSEY, ASSIGNOR OF ONE- HALF TOISAAC P. BROWN, JR, OF SAME PLACE.

A IR-HEATING-FURNACE .RADIATO R.

SPECIFICATION forming part of Letters Patent No. 350,452, dated October5, 1886.

Application filed December 4, 1885. Serial No. 184,683. (No model.)

To all whom it may concern.- Be it known that I, CHARLES P. ZIMMER- MAN,a citizen of the United States, residing in Newark, Essex county, NewJersey, have invented certain new and useful Improvements inAir-Heating-Furnace Radiators, fully described and represented in thefollowing specification and the accompanying drawings, forming a part ofthe same.

Thisinvention consists in the construction, herein shown and described,for a furnace-radiator. I

The construction will be understood by reference to the annexeddrawings, in which Figure l is a plan of a furnace and an auxiliaryair-chamber constructed as described. Fig. 2 is a side elevation of thesame, the auxiliary air-chamber and the radiating-pipes being shown insection, as well as the smokepipe of the furnace, on line at w in Fig.1; and Fig. 3 is a perspective view of the radiating pipes and theirsupporting-base without the casing.

The improvement is represented as applied to a portable furnace, A beingthe casing of the same, A the top cone, and B B the register-pipes forconveying the hot air from the furnace.

C is the base of the furnace, and D is acoldair pipe connected theretoto supply fresh air to the heated surfaces within the casing.

E is the smoke-pipe of the furnace, which, instead of conveying thesmoke directly to the chimney, conveys it through the radiatingpipesinclosed within the casing of the auxiliary air-chamber F, the latterbeing connected with the cone A by a discharge-pipe, F.

G is the base of the chamber F, and a duct, D, connects it with thecold-air pipe D, and has a damper, H, inserted in it to cut off suchair-supply, if desired.

The construction which I preferably employ for the radiating-pipes isshown in perspective in Fig. 3, common earthen draiupipe being used toform upright tubes I, through which the hot air passes upward anddownward, and earthen branch pieces being employed to connect theupright pipes together at the bottom and to the smoke inlet and out- 50let at the top.

J is the header receiving the smoke from the nozzle J upon thesmoke-pipe E. K K are the bottom headers, connected by integralcross-pipes L; and M is the header discharging the smoke into the nozzleJ which is placed on the smoke-pipe E, a sufficient distance from thenozzleJ to admit a damper, N, between the two. The pipes I are providedat their upper ends with the usual sockets, I, and the headers K K areformed with sockets to receive thelower ends of said pipes, the branchesJ M being formed with nozzles to fit into the sockets I, and the socketsall being tightly cemented with putty formed chiefly of plum- -bago,which I find is adapted to endure the temperature to which it isexposed. The ends of all the branch pipes are extended outside thecasing, as shown in Fig. 1, to secure convenient access thereto forcleaning them out. As the headers J and M have no communication with oneanother inside the air-chamber F, it is obvious that when the smoke isadmitted to the header J it must pass downward and through thecross-pipes L to reach the header M. The opening of the damper N in thepipe E thus permits a direct passage of the smoke from the furnace A tothe chimney, while the closing of the damper N obstructs such directpassage and compels the smoke to traverse all the pipes-of the radiatorbefore escaping to the chimney Oapsm are applied to all the exposed.ends of the headers to close the same, except when cleaning, and adamper, 0, is provided in the duct D to cut off the supply of cold airto the casing F, and a damper, P, is also inserted in the discharge pipeF, to disconnect the auxiliary air-chamber from the top of the furnace.

The operation of this attachment is as follows: When the furnace fire isfirst lighted, o the damper O or P may be closed and the damper Nopened, the smoke from the furnace then'passing directly to the chimneywithout affecting the radiator. When the fire is sufficiently hot,thedamper N is closed to drive the 5 smoke through the radiator, and thedampers O and 1? being closed a continuous current of cold air entersthe base G, passes upward through holes 9, circulates around theradiating-pipes and passes into the top of the fur- ICO nace through thepipe F, the air thus supplied to the furnace being sufficiently warmedto require but little additional heat from the radiating-surfaces in thefurnace to fit it for entering the register-pipes. If desired,aconnection, Q, may be made from the air-cham ber F directly to one ofthe register-pipes, and the air warmed by-the radiator may be permittedto supply such pipe exclusively, or with the aid of the furnace inconnection therewith. In such a construction a damper, B, would beinserted in the connection Q, to close it when the air from the chamberF was not sufficiently heated to supply a register, and a damper, S,would be inserted in the register-pipe to cut off the air from thefurnace when it was sup-.

plied by the air-chamber F. The extending of the ends of the branchesoutside the casing or walls of the chamber F permits the cleaning of theradiator without disconnecting any of its parts.

Having thus set forth my invention, it will be seen that it affords aconvenient means of utilizing the greater part of the heat whichcommonly escapes to the chimney, and that it may be readily disconnectedfrom the furnace, when desired, so as not to affect its ordinaryoperation. The furnace shown herein at "A is of that cylindrical form inwhich no space exists at the side of the lire-pot to contain a radiatorin which the gases can be traversed back and forth in their passage tothe chimney. The discharge of the heated gases from the furnace istherefore through short passages, and the gases are discharged from thefurnace at quite a high temperature, and in such case my auxiliaryair-chamber is of great advan tage.

I claim 1. The combination, with a hotair furnace,

of an auxiliary air-chamber containing vertical collared earthenwarepipes having headers connected together at one end of said pipes anddisconnected at their opposite ends, the smoke pipe from the furnacebeing connected with both of said disconnected headers, and a damperbeing inserted in the smoke-pipe between its connections to saidheaders, so as when closed to direct the smoke and gases through theradiating-pipes, as and for the purpose set forth.

2. The combination, with a hot-air furnace, of a discharge-pipe, B, anauxiliary airchamber supplied with cold air and containingradiating-pipes connected with the smoke-pipe of the furnace, and theair-chamber being provided with a discharge-pipe leading to the top ofthe furnace, adamper, P, in said discharge pipe F, a connection, Q, tothe register-pipe B, and a damper, R, in such connection, as and for thepurpose set forth.

3. The combination, with the furnace A, an auxiliary air-chamber, F,containing radiating-pipes connected with the smoke-pipe of the furnace,of the cold-airpipe D, supplying the base of the furnace, the duct D,supplying the base of the air-chamber, the damper O in the said duct,and adischarge-pipe from the top of the air-chamber, as and for thepurpose set forth.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

CHARLES P. ZIBfIBIEIt-HANV Witnesses:

J. R. HAYNES, THOS. S. CRANE.

